File content as of revision 11:7029367a1840:

// LLComms.cpp

#include "LLComms.h"

LLComms::LLComms(int spi_frequency) : 
    pinGate6(PE_11),
    spi(PC_12, PC_11, PC_10),
    pinCheck(PE_5),
    // These interrupt pins have to be declared AFTER SPI declaration. No Clue Why.
    pinGate0(PF_11),
    pinGate1(PG_14),
    pinGate2(PF_15),
    pinGate3(PF_12),
    pinGate4(PF_3),
    pinGate5(PF_13),
    //pinGate6(PE_11), // See above nonsense
    pinGate7(PE_13),
    pinReset(PD_2),
    queue(32 * EVENTS_EVENT_SIZE)
{ // Constructor
    _spi_frequency = spi_frequency;

    PinName LLPins[8] = {PD_15, PE_10, PD_14, PD_11, PE_7, PD_12, PF_10, PD_13};
    PinName ADCPins[8] = {PG_12, PG_9, PE_1, PG_0, PD_0, PD_1, PF_0, PF_1};
    for (short int i = 0; i < 8; i++) {
        isDataReady[i] = 0;
        cs_LL[i] = new DigitalOut(LLPins[i]);
        cs_ADC[i] = new DigitalOut(ADCPins[i]);
    }
    
    // Initialise relevant variables
    for(short int i = 0; i<N_CHANNELS; i++) {
        // All chip selects in off state
        *cs_LL[i] = 1;
        *cs_ADC[i] = 1;
    }
    pinReset = 1; // Initialise reset pin to not reset the controllers.
    wait(0.25);
    pinReset=0; // Reset controllers to be safe
    wait(0.25);
    pinReset = 1; // Ready to go
    
    // Set up rise interrupts MIGHT NOT NEED TO BE POINTERS
    pinGate0.rise(this,&LLComms::rise0);
    pinGate1.rise(this,&LLComms::rise1);
    pinGate2.rise(this,&LLComms::rise2);
    pinGate3.rise(this,&LLComms::rise3);
    pinGate4.rise(this,&LLComms::rise4);
    pinGate5.rise(this,&LLComms::rise5);
    pinGate6.rise(this,&LLComms::rise6);
    pinGate7.rise(this,&LLComms::rise7);
    // Set up fall interrupts MIGHT NOT NEED TO BE POINTERS
    pinGate0.fall(this,&LLComms::fall0);
    pinGate1.fall(this,&LLComms::fall1);
    pinGate2.fall(this,&LLComms::fall2);
    pinGate3.fall(this,&LLComms::fall3);
    pinGate4.fall(this,&LLComms::fall4);
    pinGate5.fall(this,&LLComms::fall5);
    pinGate6.fall(this,&LLComms::fall6);
    pinGate7.fall(this,&LLComms::fall7);
}

//LLComms::~LLComms(void) { } // Destructor

void LLComms::SendReceiveData(int channel) {
    int intPosSPI_Rx[N_CHANNELS]; // 13 bit value received over SPI from the actuator
    
    // Get data from controller
    spi.format(16,2);
    spi.frequency(_spi_frequency);
    mutChannel[channel].lock(); // Lock mutex for specific Channel
    *cs_LL[channel] = 0; // Select relevant chip
    intPosSPI_Rx[channel] = spi.write(demandPosition[channel]); // Transmit & receive
    *cs_LL[channel] = 1; // Deselect chip
    isDataReady[channel] = 0; // Data no longer ready, i.e. we now require new data
    /*if(channel == 0) {
        intGlobalTest = intPosSPI_Rx[channel];
        dblGlobalTest = ((double) (intPosSPI_Rx[channel])/8191.0*52.2);
    }*/
    
    // Sort out received data
    chrErrorFlag[channel] = intPosSPI_Rx[channel]>>13;
    
    intPosSPI_Rx[channel] = intPosSPI_Rx[channel] & 0x1FFF;
    //dblPosition_mtrs[channel] = (double)intPosSPI_Rx[channel]/8191*(MAX_ACTUATOR_LENGTH/DBL_ACTUATOR_CONVERSION[channel])/1000;
    mutChannel[channel].unlock();//unlock mutex for specific channel
    //printf("%d, %d\r\n",intPosSPI_Rx[0],_intDemandPos_Tx[0]);
}

// Common rise handler function 
void LLComms::common_rise_handler(int channel) {
    pinCheck = 1;
    if (isDataReady[channel]) { // Check if data is ready for tranmission
        ThreadID[channel] = queue.call(this,&LLComms::SendReceiveData,channel); // Schedule transmission
    }
}

// Common fall handler functions
void LLComms::common_fall_handler(int channel) {
    pinCheck = 0;
    queue.cancel(ThreadID[channel]); // Cancel relevant queued event
}

// Stub rise functions
void LLComms::rise0(void) { common_rise_handler(0); }
void LLComms::rise1(void) { common_rise_handler(1); }
void LLComms::rise2(void) { common_rise_handler(2); }
void LLComms::rise3(void) { common_rise_handler(3); }
void LLComms::rise4(void) { common_rise_handler(4); }
void LLComms::rise5(void) { common_rise_handler(5); }
void LLComms::rise6(void) { common_rise_handler(6); }
void LLComms::rise7(void) { common_rise_handler(7); }
// Stub fall functions
void LLComms::fall0(void) { common_fall_handler(0); }
void LLComms::fall1(void) { common_fall_handler(1); }
void LLComms::fall2(void) { common_fall_handler(2); }
void LLComms::fall3(void) { common_fall_handler(3); }
void LLComms::fall4(void) { common_fall_handler(4); }
void LLComms::fall5(void) { common_fall_handler(5); }
void LLComms::fall6(void) { common_fall_handler(6); }
void LLComms::fall7(void) { common_fall_handler(7); }

double LLComms::ReadADCPosition_mtrs(int channel) {
    unsigned int outputA;
    unsigned int outputB;
    int output;
    double dblOutput;

    spi.format(8,0);
    spi.frequency(1000000);
    
    *cs_ADC[channel] = 0;
    spi.write(PREAMBLE);
    outputA = spi.write(CHAN_3);
    outputB = spi.write(0xFF);
    *cs_ADC[channel] = 1;
    
    outputA = outputA & DATA_MASK;
    outputA = outputA<<8;
    output = (outputA | outputB);
    output = 4095- output;
    dblOutput = (double) (output);
    dblOutput = dblOutput*0.0229 - 21.582;
    return dblOutput;
}
    
double LLComms::ReadADCPressure_bar(int channel) {
    unsigned int outputA;
    unsigned int outputB;
    int output;
    double dblOutput;

    spi.format(8,0);
    spi.frequency(1000000);
    
    *cs_ADC[channel] = 0;
    spi.write(PREAMBLE);
    outputA = spi.write(CHAN_1);
    outputB = spi.write(0xFF);
    *cs_ADC[channel] = 1;
    
    outputA = outputA & DATA_MASK;
    outputA = outputA<<8;
    output = (outputA | outputB);
    
    dblOutput = (double)(output);
    dblOutput = dblOutput-502.0;
    dblOutput = dblOutput/4095.0*8.0;
    return dblOutput;
}